<script lang="ts" setup name="GoodsImage">
import { computed, ref } from 'vue';
import { useMouseInElement  } from '@vueuse/core'
defineProps<{
  images:string[]
}>()
const active = ref(0)
const target = ref(null)
const {elementX , elementY ,isOutside } = useMouseInElement(target)
const position = computed(()=>{
  let x = elementX.value -100
  let y = elementY.value -100
  if(x < 0) x=0
  if(y < 0) y=0
  if(x > 200) x = 200
  if(y > 200) y = 200
return {
  x,
  y
}
})
</script>
<template>
  <div class="goods-image">
    <div 
      v-if="!isOutside" 
      class="large" 
      :style="[
        {backgroundImage:`url(${images[active]})`,
        backgroundPosition: `${-position.x * 2}px ${-position.y * 2}px`}]">
        </div>
    <div class="middle" ref="target">
      <img
        :src="images[active]"
        alt=""
      />
      <div 
        v-if="!isOutside" 
        class="layer"
        :style="{ left:position.x +'px',top:position.y + 'px'}"
        ></div>
    </div>
    <ul class="small">
      <li 
        v-for="(item , index) in images" 
        :key="item" 
        @mouseenter="active = index" 
        :class="{ active: active === index }">
        <img
          v-lazy="item"
          alt=""
          
        />
      </li>
    </ul>
  </div>
</template>

<style scoped lang="less">
.goods-image {
  width: 480px;
  height: 400px;
  position: relative;
  display: flex;
   z-index: 500;
  .large {
    position: absolute;
    top: 0;
    left: 412px;
    width: 400px;
    height: 400px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    background-repeat: no-repeat;
    background-size: 800px 800px;
    background-color: #f8f8f8;
  }
  .middle {
    width: 400px;
    height: 400px;
    background: #f5f5f5;
    position: relative;
    cursor: move;
    .layer {
      width: 200px;
      height: 200px;
      background: rgba(0,0,0,.2);
      left: 0;
      top: 0;
     position: absolute;
  }
  }

.small {
    width: 80px;
    li {
      width: 68px;
      height: 68px;
      margin-left: 12px;
      margin-bottom: 15px;
      cursor: pointer;
      &:hover,
      &.active {
        border: 2px solid @xtxColor;
      }
    }
  }
}
</style>